Minor changes in blood lipids after 6 weeks of high-volume low- intensity physical activity with strict energy balance control.
2006 (English)In: Eur J Appl Physiol, ISSN 1439-6319, Vol. 96, no 3, 1-7 p.Article in journal (Refereed) Published
Physical activity has been shown to favorably affect metabolic risk markers, including blood lipids. The impact of high-energy turnover, without influencing the traditionally used markers of exercise training effects, on blood lipids is still unclear. The aim was to study the effect of high-volume low-intensity physical activity on the blood lipid pattern, with a tight control of diet and energy balance. Eight untrained men [42.5 (12.1) years, body mass index 24.2 (2.8) kg m(-2)] were tested in two different 6-week protocols. In the sedentary protocol, the subjects were instructed to limit their everyday physical activity. In the activity protocol, a 2-h physical activity bout was performed 5 days week(-1) (~40% of VO(2max); equivalent of an additional 21 MJ week(-1) in energy expenditure). The diet for both protocols comprised ~40 energy percent (E%) fat, ~50 E% carbohydrates (CHO). The polyunsaturated fatty acids to saturated fatty acids ratio of the diet was ~0.12. There were no changes during each 6-week period or differences between the two protocols in body weight, body composition or aerobic capacity. Low-intensity physical activity did not affect lipid parameters substantially, except for a slightly lower Apo-B/Apo-A1 ratio with the activity protocol (P<0.05). Total and low-density lipoprotein cholesterol, as well as Apo-B and Apo-A1, were increased during the beginning of each 6-week period (P<0.05), but returned to basal levels by the sixth week. In conclusion, 6 weeks of high-volume low-intensity physical activity did not affect blood lipids substantially.
Place, publisher, year, edition, pages
2006. Vol. 96, no 3, 1-7 p.
Anthropometry, Body Composition, Cross-Over Studies, Energy Intake, Exercise, Humans, Lipids/*blood, Lipoproteins/*blood, Male, Oxygen Consumption, Triglycerides/*blood
IdentifiersURN: urn:nbn:se:uu:diva-75446PubMedID: 16344937OAI: oai:DiVA.org:uu-75446DiVA: diva2:103357